Having any voltage at all showing in the ground wires would concern me greatly. It's a safety issue, isolation by disconnection is a risk not a fix, hopefully you mean something else.

What I do is poll the HS110 every few seconds and record the current values to a record (line) in a google sheet. Google let's you store data in google sheets for free, so I can archive the sheet and...

I don't think TP Link has anything for installation in wall. If you do put something in-wall you need to be very careful it's certified for use there or you may be denied insurance coverage should it...

@Kiwifruit Something must be different :). Very unlikely to be a hardware fault - the devices either work or they don't. If it's not firmware levels and the device LED isn't flashing, it might be the...

Maybe try it in a location where you've already got a working bulb? If it still doesn't setup it sounds like it might be a hardware problem and needs to be exchanged.

@Kiwifruit I'm not sure, but it still might be a misconfiguration of your router. What do you mean by "MAC to IP binding for security purposes"? That suggests either filtering or blocking at your...